CacheNormalDecoder.hpp

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#ifndef CacheNormalDecoder_HPP
#define CacheNormalDecoder_HPP

#include <iterator>
#include "io/codec/decoder/CacheDecoderBase.hpp"  
#include "io/FDRepr.hpp"  

template <class FR = FDRepr>
class CacheNormalDecoder : public CacheDecoderBase<FR>
{
   protected: 
      typedef CacheDecoderBase<FR> PARENT;
   public:

      typedef typename CacheDecoderBase<FR>::params_t params_t;

      CacheNormalDecoder(const params_t* par)
         : CacheDecoderBase<FR>(par){}

      static bool DINLINE isDFO()
      {
         return false;
      }  


      template <typename InputIterator> void writeItemsetAndCounter(
         InputIterator first, InputIterator last, 
         counter_t support )
      {
         std::streamsize pos = PARENT::buffer_size;
         Formatter::SupportToStringBack(support, PARENT::buffer, pos);

         unsigned int length;
         while( last != first )
         {
            --last;
            PARENT::buffer[--pos] = ' ';
            length = PARENT::code_inverse[*last].second;
            pos -= length;
            memcpy( &PARENT::buffer[pos], PARENT::code_inverse[*last].first, 
                    length);
         }
         writeToFile( &PARENT::buffer[pos], PARENT::buffer_size - pos );   
      };
};

#endif

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